tests: add more nodes in ooo testing scenario

adding more node in this scenario could help to have a better coverage
so we can catch more potential bugs.

Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>

tests/functional/centos/7/ooo-collocation/hosts

@@ -60,6 +60,8 @@ all:
 clients:
   hosts:
     client0: {}
+    client1: {}
+    client2: {}
 mdss:
   hosts:
     mon0: {}
@@ -69,11 +71,15 @@ mgrs:
 mons:
   hosts:
     mon0: {}
+    mon1: {}
+    mon2: {}
 nfss:
   hosts: {}
 osds:
   hosts:
     osd0: {}
+    osd1: {}
+    osd2: {}
 rbdmirrors:
   hosts: {}
 rgws:

tests/functional/centos/7/ooo-collocation/vagrant_variables.yml

@@ -4,13 +4,13 @@
 docker: True
 
 # DEFINE THE NUMBER OF VMS TO RUN
-mon_vms: 1
-osd_vms: 1
+mon_vms: 3
+osd_vms: 3
 mds_vms: 0
 rgw_vms: 0
 nfs_vms: 0
 rbd_mirror_vms: 0
-client_vms: 1
+client_vms: 3
 iscsi_gw_vms: 0
 mgr_vms: 0